【Immersive Sound Experience】Featuring advanced panoramic sound technology, the A89 TWS Bluetooth-compatible earbuds deliver a three-dimensional audio field, creating an immersive listening experience akin to a personal mobile theater or live concert. 【Seamless Connectivity】Upgraded connection method allows for effortless switching between single and dual-ear modes, with synchronized signal transmission to both ears. Either earbud can function as the primary device. 【Enhanced Call Quality】Equipped with ENC dual-microphone noise reduction algorithm, these earbuds ensure crystal-clear conversations even in noisy environments like subways or busy streets. 【Long-lasting Battery Life】Enjoy up to 5 hours of playtime at 70% volume on a single charge, with the charging case providing approximately 4 additional full charges. 【Versatile Compatibility】Compatible with any device featuring Bluetooth-compatible functionality, making them suitable for a wide range of audio playback devices. Specifications: Bluetooth-compatible version: 5.4 Charging times of the charging case: about 4 times Charging time: about 1.5 hours Sensitivity: 105dB+3dB Communication distance: 10 meters Music time: about 5 hours (70% volume) Speaker size: 10mm Battery capacity: earphones: 35mAh, charging case: 250mAh Speaker impedance: 32Ω Applicable: playback devices with Bluetooth-compatible function Dimensions: headphones: 22*24*33mm, charging case: 54*54*30mm